Theatre set Improvariace is composed of two improvisational teams - Ext.A.SE. (Extra active set) and Vý.K.Ř.I.K. (Exceptional collective improvisation proper mates) that are devoted several years of theater improvisation. At present, mainly older group Ext.A.SE. focuses on improvisation longer format (full-length improvised play called improvariace), also experimenting with improvisations literary or film footage is also involved in sports, theater formats by Keith Johnston, etc. Both teams, however, do not leave the field or improvisation matches and tournaments, trying to However, they do bring back sports hub and accentuate paradoxical, but the audience very attractive combination of theater and sports.